<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <script src="lib/jquery-3.3.1.min.js"></script>
</head>
<body>
   <div>div</div>
   <p>end</p>
  
    <script>
        var $p=$("<p>one</p>");
        var $h4=$("<h4>h4</h4>")
        $("div").after($p);
        $("p:contains(end)").before($h4);
    </script>
</body>
</html>